ABAP Select data from SAP table REBD_MEAS_COMP_L into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP REBD_MEAS_COMP_L table and store it within an internal table, including using the newer @DATA inline declaration methods. It also shows you various ways to process this data using ABAP work area, inline declaration or field symbols including executing all the relevant CONVERSION_EXIT routines specific to REBD_MEAS_COMP_L. See here for more generic Select statement tips.

Sometimes data within SAP is stored within the database table in a different format to what it is displayed to the user. These input/output conversation FM routines are what translates the data between the two formats.

There is also a full declaration of the REBD_MEAS_COMP_L table where each field has a char/string type for you to simply copy and paste. This allows you to use processing that is only available to these field types such as the CONCATENATE statement.

DATA: IT_REBD_MEAS_COMP_L TYPE STANDARD TABLE OF REBD_MEAS_COMP_L,
      WA_REBD_MEAS_COMP_L TYPE REBD_MEAS_COMP_L,
      GD_STR TYPE STRING.

DATA: lo_typedescr type REF TO cl_abap_typedescr.
DATA: lv_fieldname type fieldname.

FIELD-SYMBOLS: <FIELD> TYPE any.
FIELD-SYMBOLS: <REBD_MEAS_COMP_L> TYPE REBD_MEAS_COMP_L.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_REBD_MEAS_COMP_L.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM REBD_MEAS_COMP_L
  INTO TABLE IT_REBD_MEAS_COMP_L.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM REBD_MEAS_COMP_L
*  INTO TABLE @DATA(IT_REBD_MEAS_COMP_L2).
*--Further methods of using ABAP code to  select data from SAP database tables

*You can also declare the header/work area using the in-line DATA declaration method
READ TABLE IT_REBD_MEAS_COMP_L INDEX 1 INTO DATA(WA_REBD_MEAS_COMP_L2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_REBD_MEAS_COMP_L ASSIGNING <REBD_MEAS_COMP_L>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<REBD_MEAS_COMP_L>-MEAS = 1.
<REBD_MEAS_COMP_L>-XMMEAS = 1.
<REBD_MEAS_COMP_L>-MEASVALUE = 1.
<REBD_MEAS_COMP_L>-MEASUNIT = 1.
<REBD_MEAS_COMP_L>-MEASVALUECHILD = 1.

ENDLOOP.

LOOP AT IT_REBD_MEAS_COMP_L INTO WA_REBD_MEAS_COMP_L.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_REBD_MEAS_COMP_L-MEASUNITCHILD, sy-vline,
  WA_REBD_MEAS_COMP_L-VALIDFROM, sy-vline,
  WA_REBD_MEAS_COMP_L-VALIDTO, sy-vline,
  WA_REBD_MEAS_COMP_L-ISSUMMEAS, sy-vline,
  WA_REBD_MEAS_COMP_L-ICONCOMPARE, sy-vline,
  WA_REBD_MEAS_COMP_L-ICONSUM, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_REBD_MEAS_COMP_L you want to display...

  WRITE:/ sy-uline.
* Aternatively use generic code to Write field values (and NAME) to screen report
  DO.
    ASSIGN COMPONENT sy-index OF STRUCTURE wa_REBD_MEAS_COMP_L TO <field>.
    IF sy-subrc <> 0. EXIT. ENDIF.
    WRITE:/ 'Field Value', <field>, sy-vline.
    gd_str = <field> .
    lo_typedescr ?= CL_ABAP_DATADESCR=>DESCRIBE_BY_DATA( <field> ).
    lv_fieldname = lo_typedescr->GET_RELATIVE_NAME( ).
    WRITE:/ 'Field Name', lv_fieldname.
  ENDDO.

  
*Redo loop but convert all fields from internal to out value  
LOOP AT IT_REBD_MEAS_COMP_L INTO WA_REBD_MEAS_COMP_L.


*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Convert all fields to display/output versions using conversion routines
  PERFORM convert_all_field_values CHANGING wa_EKKO.
	 
ENDLOOP.

  
*&---------------------------------------------------------------------*
*& Form convert_all_field_values
*&---------------------------------------------------------------------*
FORM convert_all_field_values CHANGING p_EKKO LIKE wa_EKKO.
DATA: ld_input(1000) TYPE c, ld_output(1000) TYPE C.

*Conversion exit ALPHA, internal->external for field MEAS
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_REBD_MEAS_COMP_L-MEAS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_REBD_MEAS_COMP_L-MEAS.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field MEASUNIT
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_REBD_MEAS_COMP_L-MEASUNIT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_REBD_MEAS_COMP_L-MEASUNIT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field MEASUNITCHILD
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_REBD_MEAS_COMP_L-MEASUNITCHILD
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_REBD_MEAS_COMP_L-MEASUNITCHILD.
WRITE:/ 'New Value:', ld_input.

*Conversion exit REDAT, internal->external for field VALIDTO
CALL FUNCTION 'CONVERSION_EXIT_REDAT_OUTPUT'
  EXPORTING
    input =                      WA_REBD_MEAS_COMP_L-VALIDTO
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_REBD_MEAS_COMP_L-VALIDTO.
WRITE:/ 'New Value:', ld_input.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_REBD_MEAS_COMP_L_STR, 
MEAS TYPE STRING,
XMMEAS TYPE STRING,
MEASVALUE TYPE STRING,
MEASUNIT TYPE STRING,
MEASVALUECHILD TYPE STRING,
MEASUNITCHILD TYPE STRING,
VALIDFROM TYPE STRING,
VALIDTO TYPE STRING,
ISSUMMEAS TYPE STRING,
ICONCOMPARE TYPE STRING,
ICONSUM TYPE STRING,END OF T_EKKO_STR.
DATA: WA_REBD_MEAS_COMP_L_STR type T_EKKO_STR.

DATA: ld_text TYPE string.

LOOP AT IT_EKKO INTO WA_EKKO.
  MOVE-CORRESPONDING wa_EKKO TO WA_EKKO_STR.
  CONCATENATE: sy-vline
WA_REBD_MEAS_COMP_L_STR-MEAS sy-vline 
WA_REBD_MEAS_COMP_L_STR-XMMEAS sy-vline 
WA_REBD_MEAS_COMP_L_STR-MEASVALUE sy-vline 
WA_REBD_MEAS_COMP_L_STR-MEASUNIT sy-vline 
WA_REBD_MEAS_COMP_L_STR-MEASVALUECHILD sy-vline 
WA_REBD_MEAS_COMP_L_STR-MEASUNITCHILD sy-vline 
WA_REBD_MEAS_COMP_L_STR-VALIDFROM sy-vline 
WA_REBD_MEAS_COMP_L_STR-VALIDTO sy-vline 
WA_REBD_MEAS_COMP_L_STR-ISSUMMEAS sy-vline 
WA_REBD_MEAS_COMP_L_STR-ICONCOMPARE sy-vline 
WA_REBD_MEAS_COMP_L_STR-ICONSUM sy-vline      INTO ld_text SEPARATED BY SPACE.

*Add any further fields from structure WA_EKKO_STR you want to CONCATENATE...
ENDLOOP.
ENDFORM.